Madrygal's cover - particular

This is just a part of the picture I made on commission for a band whose bass-guitarist has been a frind of mine for a lot of time.
I chose it because I love the head of the white horse, the mist right of the castle and the light on the hills... they are not the only things I like, but it's curious how the less evident parts of a work can become the most appreciated by the author.^^